Date: Wed, 22 Aug 2012 08:27:01 +1000 From: Peter Jeremy <peter@rulingia.com> To: Vitalij Satanivskij <satan@ukr.net> Cc: current@freebsd.org Subject: Re: dhclient cause up/down cycle after 239356 ? Message-ID: <20120821222701.GA94197@server.rulingia.com> In-Reply-To: <20120821164217.GA45780@hell.ukr.net> References: <20120821095527.GA33206@hell.ukr.net> <CAGH67wSsMTSHHHi=Qzu6kJ%2BMtFKH9s5zPTdFYSj0WD1duwWuzA@mail.gmail.com> <20120821164217.GA45780@hell.ukr.net>
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--17pEHd4RhPHOinZp Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2012-Aug-21 19:42:17 +0300, Vitalij Satanivskij <satan@ukr.net> wrote: >Look's like dhclient do down/up sequence - Not intentionally. >Aug 21 19:21:00 home kernel: fxp0: link state changed to UP >Aug 21 19:21:01 home kernel: fxp0: link state changed to DOWN >Aug 21 19:21:01 home dhclient: New IP Address (fxp0): xx.xx.xx.xx >Aug 21 19:21:01 home dhclient: New Subnet Mask (fxp0): 255.255.255.0 >Aug 21 19:21:01 home dhclient: New Broadcast Address (fxp0): xx.xx.xx.xx >Aug 21 19:21:01 home dhclient: New Routers (fxp0): xx.xx.xx.xx >Aug 21 19:21:03 home kernel: fxp0: link state changed to UP I can reproduce this behaviour - but only on fxp (i82559 in my case) NICs. My bge (BCM5750) and rl (RTL8139) NICs do not report the spurious DOWN/UP. (I don't normally run DHCP on any fxp interfaces, so I didn't see it during my testing). The problem appears to be the=20 $IFCONFIG $interface inet alias 0.0.0.0 netmask 255.0.0.0 broadcast 255.2= 55.255.255 up executed by /sbin/dhclient-script during PREINIT. This is making the fxp NIC reset the link (actually, assigning _any_ IP address to an fxp NIC causes it to reset the link). The post r239356 dhclient detects the link going down and exits. >Before r239356 iface just doing down/up without dhclient exit and >everything work fine. For you, anyway. Failing to detect link down causes problems for me because my dhclient was not seeing my cable-modem resets and therefore failing to reacquire a DHCP lease. --=20 Peter Jeremy --17pEHd4RhPHOinZp Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (FreeBSD) iEYEARECAAYFAlA0CzUACgkQ/opHv/APuIfPiwCgsdSK2xDSpxG3e2WV3OqzDwcl 3+0AoLO+E0TNyH24OjfUz2Pm2hmZIIh1 =4TdU -----END PGP SIGNATURE----- --17pEHd4RhPHOinZp--
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